Method for producing phosphorus-containing ferrite stainless steel by using iron oxide type laterite and product thereof

• Main Author: DONG SHUTONG
• Format: Patent
• Language: Chinese; English
• Published: 11.12.2013
• Subjects: ALLOYS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a method for producing phosphorus-containing ferrite stainless steel by using iron oxide type laterite. The method comprises the following steps: preparing ore, a reducing agent and high carbon ferro-chrome; preparing sinter; performing blast furnace iron making; performing AOD (Argon Oxygen Decarburization) refining; and performing LF (Ladle Furnace) refining. The method has the advantages of rich used raw materials, low cost and capabilities of saving the resource and reducing the environmental pollution; smelting of nickel, chromium and phosphorus-containing iron oxide type laterite can be performed by using a blast furnace with the volume being above 300m so as to realize long-term large-scale production and improve the production efficiency; the production cost of the stainless steel is greatly reduced; the product can be applied to corrosion-resistant places such as farms in place of galvanized steel and has the characteristics of high corrosion resistance, high recycling value, e